When I attempt to share one of my posts (only one of them, the others work fine) onto Facebook (via copy/paste and the share button), it appears as though it is marked "private" despite having changed the privacy of my blog to "public" a few days ago.

This has also occurred for friends that have tried to share the same post, using different browsers and different computers.

The exact words of the error message are: "Protected blog > Login" atop "http://gabrielmcortez.wordpress.com is marked private by its owner. If you were invited to view this site, please log in below. Read more about privacy settings."